[New][Major] replaced Skein hasing implementation

Removed existing Skein implementation from com.h2database as it does not
have allow personalization and other Skein features.

Replaced it with the Skein 1.1 version implemenation by Maarten Bodewes.
This implementation is old but for better history we commit version 1.1
and then iterate over different commits to version 1.3.
[Minor] updated the Skein implementation to be 1.2 compliant

The Skein implementation 1.2 has minor changes in the rotation
constants in the three fish algorithm. These have been updated to make
the implementation 1.2 compliant
[Minor] updated the Skein implementation to be 1.3 compliant

The Skein implementation 1.3 has a new key schedule parity constant
0x1BD11BDAA9FC1A22. The current implementation has been updated to be
1.3 compliant.